Tun — may refer to:*An antiquated British measurement of liquid volume, approximately 252 gallons or 954 litres **A cask with a volume of one tun, especially of wine. *A large sea snail of the family Tonnidae. *An insulated vessel with a false bottom… … Wikipedia

Tun — Tun, n. [AS. tunne. See {Ton} a weight.] 1. A large cask; an oblong vessel bulging in the middle, like a pipe or puncheon, and girt with hoops; a wine cask. [1913 Webster] 2. (Brewing) A fermenting vat. [1913 Webster] 3. A certain measure for… … The Collaborative International Dictionary of English